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题库 / Prep2007E1-SC-77
Scientists have found signs that moving water changed the chemical makeup of the surface of Mars in recent eras, therefore concluding that its crust is harboring up to three times as much water than was previously thought.
eras, therefore concluding that its crust is harboring up to three times as much water than was
eras, therefore concluding that the planet's crust harbors up to three times as much water or more as was
eras and have therefore concluded that the planet's crust harbors up to three times as much water as
eras and they have concluded, therefore, that its crust harbors up to three times as much water, or more, than
eras and concluded, therefore, that the planet's crust is harboring up to three times more water as was
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have found 和 have concluded平行，就是不知道为啥therefore不能放在have的前面
可以放在have前面。therefore这里属于副词，作状语。状语的位置非常灵活，放在句子的任何地方都是可以接受的。
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B，as much as or more than sth，有more必有 than（后面跟了比较对象时），不能说 as much or more as sth，将as as和more混合在一起
more..than固定搭配，排除ABDE
A错在as...than...，B错在more没有搭配than
found和concluded不应该是递进的关系吗，为啥俩都要用完成时
比较只有as as和more than，不能混用，而且water是非数值名词，肯定要用as much as
therefore是副词，不能连接两个句子。
错选B，在一道题里，如果只有分词ing的形式不同，那么通常从句＋动词的形式>分词ing形式，因为可以更清晰的表达时态的变化。
C正确，have found 和 have concluded平行
这道题as much as的用法可以排除所有的。
三步：
1.副词≠连词。SVO，therefore,SVO 错！排DE。
2.concluding 表伴随错，排AB。
3.选C
科学家发现了一件事，therefore推倒出了一件事。因此find和conclude需要在一个平行的层级上
the planet's crust harbors up to three times as much water as the water that was previously thought harbored by the crust.
伴随状语表示伴随的结果时，需要是necessary/inevitable 的结果
看前后两个句子是并列还是其他；考察therefore位置；考察时态；考察more than.
错误的搭配：
more ... as ... / as ... than ... / more ... compared with
more... rather than / rather... more than
错选A， 分开and include is better
BE少than错，
伴随状语要先于修饰部分发生或与之同时发生. harbor. V隐藏
you will NEVER have to decide between the two versions, because a problem will never have two correct answers. if you see this difference, IT'S THERE TO DISTRACT YOU. ignore it. go find some other criterion for elimination. (FROM RON)
B为什么不对啊
"was" is ok.
it's not necessary, though, because "previously" is there. so, the sentence is more efficient without it.
of course, nothing in the last post really matters for this exam, which will NEVER task you with stylistic ('good writing' / 'bad writing') decisions.for the gmat exam, the only things that matter are...
...it's acceptable to write 'have' twice, and ...it's also acceptable to omit the second 'have' (unless that omission creates a genuine ambiguity).
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错选B， therefore concluding that the planet's crust harbors 很明显一个伴随状语，看修饰主句的主语显然不合逻辑，所以选择C.
差点就选B了，感觉sov+v-ing用来表示因果放在这里很合适，但是B后面的as...as...那儿错的太明显了
所以！！做SC的时候，要确定正确答案之前一定要仔细的核对（带着句意去理解评估）